I work with a couple of people who use these. One of them has recently got a Wisper 905se City.
I picked it up the other day to gauge the weight of it and was surprised even with the battery removed for charging how heavy it was.
Although many of the cycle components are genuine cycle ones, the effort required to move it can be from full on cycling (dragging the weight of the motor and battery) to using it like a moped with just the press of a button to move along at 15mph up hill and down dale.

I picked it up the other day to gauge the weight of it and was surprised even with the battery removed for charging how heavy it was.
Although many of the cycle components are genuine cycle ones, the effort required to move it can be from full on cycling (dragging the weight of the motor and battery) to using it like a moped with just the press of a button to move along at 15mph up hill and down dale.